Small-sized cyclone-melting pulverized coal furnace

Abstract

The invention relates to a small-sized cyclone-melting pulverized coal furnace, belonging to the field of pulverized coal combustion equipment. The small-sized cyclone-melting pulverized coal furnace comprises a blade type cyclone combustor, a vortex-melting combustion chamber, a high-temperature flue gas outlet pipe, a burn-out chamber and a heat exchange hearth, wherein the blade type cyclone combustor, as a mixed inlet of primary air and pulverized coal, comprises a shell and swirl blades and is connected with the top end of the vortex-melting combustion chamber; a tangential down-sloping high-temperature air inlet (with an adjustable inclination angle) is formed in each of the left and right sides of the upper part of the vortex-melting combustion chamber, and a slag outlet is formed in the lower part of the vortex-melting combustion chamber; and the high-temperature flue gas outlet pipe is led out from a middle position of the top of the vortex-melting combustion chamber, two tangential air inlets are formed in a horizontal section of the high-temperature flue gas outlet pipe, the end part of the high-temperature flue gas outlet pipe is finally connected with the burn-out chamber in a certain expanding angle, the heat exchange hearth is arranged at the upper part of the burn-out chamber, heated surfaces are distributed in the heat exchange hearth, and the heat exchange of high-temperature flue gas is realized in the heat exchange hearth. According to the small-sized cyclone-melting pulverized coal furnace, the problems of poor coal type adaptability, low hearth temperature, instability in combustion and high fly ash carbon content of current popular small pulverized coal furnaces are improved.

Description

technical field [0001] The invention relates to a coal-fired industrial pulverized coal furnace, in particular to a small cyclone melting pulverized coal furnace. Background technique [0002] There are more than 500,000 industrial boilers in my country, of which coal-fired boilers account for about 85%. At present, small and medium-sized coal-fired boilers generally adopt the layer combustion method. During the combustion process, there are often losses such as coal leakage, fly ash, and smoke exhaust. Therefore, the operating efficiency is very low. At the same time, industrial coal-fired boilers are the second largest source of soot-type pollution after power plant boilers. The pollution is serious and it is difficult to deal with them centrally. With the increasingly prominent environmental problems, the relevant government departments have higher and higher requirements for environmental protection of industrial boilers such as energy saving and emission reduction. Boi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to overcome the problems of high coal quality requirements, unstable combustion, and high carbon content in fly ash existing in small pulverized coal boilers through the separation of combustion and heat exchange structures and the change of boiler operation mode. Reduce NOx emissions, making it more environmentally friendly and reliable

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